2106375551 has 4 divisors (see below), whose sum is σ = 2407286352. Its totient is φ = 1805464752.

The previous prime is 2106375529. The next prime is 2106375563. The reversal of 2106375551 is 1555736012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2106375551 - 2¹⁰ = 2106374527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106375521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150455390 + ... + 150455403.

It is an arithmetic number, because the mean of its divisors is an integer number (601821588).

Almost surely, 2^2106375551 is an apocalyptic number.

2106375551 is a deficient number, since it is larger than the sum of its proper divisors (300910801).

2106375551 is an equidigital number, since it uses as much as digits as its factorization.

2106375551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300910800.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 2106375551 is about 45895.2671960846. The cubic root of 2106375551 is about 1281.8737918726.

The spelling of 2106375551 in words is "two billion, one hundred six million, three hundred seventy-five thousand, five hundred fifty-one".